TUBE MP
Professional Tube Microphone Preamp
USER’S GUIDE
Introduction CONNECTIONS
It’s easy to interface theTUBE MP with other equipment. All con-
Thank you for purchasing the TUBE MP-and congratulations: You now own
nections are made at the back of theTUBE MP. Standard XLR and
one of the most sophisticated pieces of audio signal-processing gear
1/4" inputs and outputs make patching simple. Note: For best
Offering a superb level of sound quality, the TUBE MP's special tube and
audio quality, always use high-quality cables.
integrated circuit design combined with a straightforward user interface
quickly and easily Rives you access to all of its features.
Inputs
The TUBE MP provides both an XLR and 1/4”input jack. Use the
Features : balanced XLR input for use with a microphone. Audio input as
70dB of Gain well as phantom power (if needed switchable on and off) is sup-
12AX7 Tube plied through this jack. Use the unbalanced l/4” input jack for
XLR Balanced Input instrument applications.
1/4”TS Instrument Input
Balanced XLR Output XLR pin configuration: pin 1 = gnd pin 2 = Positive (hot), pin 3
1/4”TS 0utput = negative.
Switchable Phantom Power
Phase Reverse Switch Do not Use both inputs at the same time.
20dB Gain Switch
Input Gain Control Outputs
output Level Control The XLR output of theTUBE MP is active balanced You may “se it
1OHz to 2OKHz Frequency Response in an unbalanced configuration without harm to the output cir-
>lOOdB Dynamic Range cuitry. Use the unbalanced 1/4” jack for sending your signal to
AU Steel Chassis amps, processors or other unbalanced configurations. Also, both
Designed & Manufactured in the USA outputs may be used at the same time.
Fill in the following information for your reference: Power
Insert the supplied 9 Volt AC adapter’s plug into the input labeled
Date of purchase:______________________________________ Pwr, 9VAC on theTUBE MP’s back panel.
Purchased from:______________________________________ The TUBE MP is powered by an external 9VAC adapter. Always
make sure the output plug is securely plugged into the rear of the
Serial number: 127-______________________________________ TUBE MP, and that the adapter is held firmly in an electrical out-
let. Never operate the TUBE MP or AC adapter in the rain or in
This is a great time to fill out the User Registration Card included with your wet locations. lf the AC adapter’s cord is ever cut, discontinue use
TUBE MP to become a completely informed A R T Artist. Returning the and replace the adapter with a new one. Unplug the adapter
card to us ensures you of becoming the first to know about new A R T when the TUBE MP is not in use. Refer to the label on the adapter
products as well as any further developments from A R T. or the specifications later in this manual for the appropriate oper-
ating voltages.
127-5004-101
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Controls, Switches and Indicators: output to a maximum of +10dB of gain. This gain is in addition
Input Control to the existing input gain.
The input control sets the amount of input Gain of theTUBE MP
Power/Peak L.E.D.
Turn the control clockwise to increase gain and counterclockwise
When power is applied to the TUBE MP the Power/Peak L.E.D.
to decrease gain. You may control two ranges of gain with this
lights green. This L.E.D. also serves as the signal clip indicator. If
control, +26 to +6OdB and +6 to +4OdB. Selection of the gain
too much signal is present this L.E.D. lights red. If the L.E.D. is
range is made with the +20dB Gain Switch.
constantly lit, reduce the signal level with the Input Control. The
+2OdB Gain/Norm Switch clip L.E.D. is positioned at the tube's output in the circuitry and
lights when a level 6dB below hard clipping dB is reached.
Use the +2OdB Gain/Norm switch to set the gain range of the
Input control. When the witch is out, theTUBE MP operates in
Normal mode Depressing the switch adds 20dB of gain. This Product Description
mode is indicated by the labeling in red and corresponds directly A RT’s TUBE MP circuitry is a hybrid design utilizing the latest and
to the Input control’s red gain range labeling For microphone best solid state and tube technology, Using a transformerless
applica-tions, where more level is needed, push the witch in. design throughout the TU BE MP maintains cxccptional signal
mtegrity and extremely low noise. T h e active balanced input uti-
P-Pwr +48V/Out Switch lizes a hybrid multiple paired transistor/opamp design providing
Use theTUBE MP’s phantom power to supply power to all micro- extremely low noise and excellent CMRR. The instrument input
phones requiring +48V phantom power. has a high impedance preventing the loading of any device con-
nected to it. Phantom power is derived from the incoming AC
The TUBE MP's Phantom power is engaged and disengaged with voltage. The XLR output is active balanced and the 1/4" output is
this witch Phantom power is applied to pins 2 and 3 of the XLR unbalanced with a 300 ohm impcdance.
Input jack when this switch is pushed in. To disengage phantom
power, position the switch in the out position. Applications:
Power Phase Reverse/Norm Switch
The main application of the TUBE MP is a microphone preamplifi-
er. Plug any microphone directly into either input and set the
Phase Reverse/Norm Switch
Input and Output controls to provide a healthy level into the next
To set the phase of the TUBE MP’s output signal, “se this switch.
stage of your system.
When the switch is in the Out position the output signal is nor-
mal. Depressing the switch reverses the phase of the output sig-
Use the TUBE MP as an acoustic or piezo pickup preamplifier to
nal.
run directly into a console, amplifier, signal procesor or recorder.
In multi-microphone applications, mic placement can affect the
You may use the TUBE MP to interface any instrument directly to
phase of the signals If your sound is “thin” or "out of position,”
a live or recording console’s line input, amplifier, signal processor
reverse the phase to correct the problem.
or recorder.
Output Control
The TUBE MP may also be used as a direct box.
The output control sets the output level of the TUBE MP. When
the control is fully counterclockwise the output level of the TUBE
MP is zero. Turning the control clockwise increases the level of
the
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A R T TUBE MP Specifications WARRANTY & SERVICE INFORMATION
Dimensions 5.O”H X 5.5”W X 2.0”H LIMITED WARRANTY
Weight I.5 Lbs Warranty service for this unit will be provided by Applied
Input Connections XLR (balanced) l/4”TS Research & Technology, Inc. in accordance with the following
Output Connections XLR (balanced). l/4”TS warrant statement.
Input Impedance XLR, l/4” 2K ohms, 840K ohms
Output Impedance XLR, l/4” 600 ohms, 300 ohms Applied Research & Technology, Inc. (A R T) warrants to the origi-
Maximum Input Level, XLR +14dBu nal purchaser that this product and the components thereof will
Maximum Input Level, 1/4” +22dBu be free from defects in workmanship and materials for a period of
Maximum Output Level, XLR +28dBu one year from the date of purchase. Applied Research &
Maximum Output Level, l/4” +22dBu Technology, Inc. will, without charge, repair or replace, at its
CMRR >75dB (typical @ 1KHz) option, defective product or component parts upon prepaid deliv-
Frequency Response IOHz to 2OKHz (+O, -1dB) ery to the factory service department or authorized service center,
Dynamic Range >100dB (20-20KHz) accompanied by proof of purchase date in the form of a valid sales
Total Harmonic Distortion (THD) <0.1% (typical) receipt.
Maximum Gains
XLR to XLR 70dB (typical) EXCLUSIONS: This warranty does not apply in the event of misuse
1/4" to l/4” 54dB (typical) or abuse of the product or as a result of unauthorized alterations
XLR to 1/4” 64dB (typical) or repairs. This warranty is void if the serial number is altered,
1/4" to XLR 6OdB (typical) defaced, or removed.
Equivalent Input Noise (EIN)
XLR to XLR -129dBu ('A' weighted) A R T reserves the right to make changes in design or make addi-
l/4” to l/4” -105dBu ('A' weighted) tions to or improvements upon this product without any obliga-
Power Requirements 9 Volts A.C. @ 7OOma tion to install the same on products previously manufactured.
(typ)
A R T shall not be liable for any consequential damages, including
A R T retains a policy of constant product improvement. without limitation damages resulting from loss of use. Some states
Therefore, specifications are subject to change without notice. do not allow limitation of incidental or consequential damages, so
the above limitation or exclusion may not apply to you. This war-
A R T reserves the right to make changes in design or make addi- ranty gives you specific rights and you may also have other rights
tions to or improvements upon this product without any obliga- which vary from state to state.
tion to install the same on products previously manufactured.
For units purchased outside the United States, service will be pro-
Applied Research and Technology, Inc. vided by an authorized distributor of Applied Research and
215 Tremont Street Technology, Inc.
Rochester, NY 14608
716/436-2720, 716/436-3942 (FAX), http://www.artroch.com
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Service Additional Information
The following information is provided in the unlikely event that If you are planning to purchase additional equipment for your
your unit requires service. Use this procedure to return units in audio needs, please consider the following A R T Products.
the United States only. For service outside the United States,
please contact your authorized A R T distributor. Recording/ Live Sound:
MR-1, Personal Reverb Processor
1) Be sure that the unit is the cause of the problem. Check to Tube MP, Personal Microphone Preamplifier
make sure the unit has power supplied, all cables are connected MDM-8L, Eight channel compressor/limiter
correctly, and the cables themselves are in working condition. Pro Gate, Eight channel programmable Noise Gate
SC-2, two channel compressor/limiter/gate
2) If you find the unit to be at fault, write down a description of MDC-2001, Stereo dynamics processor
the problem, including how and when the problem occurs. FXR and FXR Elite (II), Two channel Digital multi-effects proces-
sors
3) Call A R T’s Customer Service Department to obtain a Return Effects Network, Digital Dedicated and multi-effects processor
Authorization (RA) number. Multiverb Alpha, Digital multi-effects processor
HD-15, Two channel 15 band EQ
4) Pack the unit in its original carton or a reasonable substitute. HD-31, 31 band EQ
The packing box is not recommended for a shipping carton. Put Pro MP, Professional two channel microphone preamp
the packaged unit in another box for shipping. Print the RA num-
ber clearly under the address. Instrument Applications:
XTREME, Personal guitar processor with digital effects
5) Include with your unit: a return shipping address (we cannot DST-4, Programmable guitar preamp with digital effects
ship to a P.O. Box), a copy of your purchase receipt, a daytime Power Plant, Studio guitar preamp
phone number, and a description of the problem. DST 8080, 80 watt/ channel powered guitar preamp with effects
The Acoustic, Personal acoustic guitar processor with digital
6) Ship the unit to: effects
APPLIED RESEARCH AND TECHNOLOGY, INC. SGX-2000, Analog and digital preamp/ processor for guitar
215 TREMONT STREET SGX-Nightbass, Analog and digital preamp/ processor for guitar
ROCHESTER, NY 14608 ECC, Guitar floor processor
ATTN: REPAIR DEPARTMENT BCC, Bass floor processor
RA # ___________________
MIDI:
7) Contact our customer service department at 716/436-2720 for X-15, MIDI foot controller with two expression pedals
your Return Authorization number or questions regarding repairs. X-12, MIDI foot controller with optional Power Pedal controller
Customer Service hours are 9:00 AM to 6:00 PM Eastern Time,
Monday through Friday. For a full line catalog, write, call in, or email us to request one.
For up to date information on new products send in your User
Registration card NOW!
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